anoestrus vs anestrus

anoestrus and anestrus both are nouns.

Word	Noun	Adjective	Verb	Adverb
anoestrus	Yes	No	No	No
anestrus	Yes	No	No	No

As nouns, anoestrus and anestrus are synonyms defined as:

anoestrus and anestrus: applies to nonhuman mammals: a state or interval of sexual inactivity between two periods of estrus

Other synonyms of anoestrus include anestrum, anoestrum.

anoestrus (noun)	anestrus (noun)
applies to nonhuman mammals: a state or interval of sexual inactivity between two periods of estrus	applies to nonhuman mammals: a state or interval of sexual inactivity between two periods of estrus